How It Works

1
Insert batteries
Open the back, drop in 2 AAA batteries (included). LED blinks slowly - ready to pair.
2
Pair in eWeLink
Open eWeLink, tap +, choose Quick Pairing. Hold the reset button on the sensor for 5 seconds until the LED blinks fast. Pairs in ~60 seconds.
3
Stick on door + frame
Peel the adhesive tape. Stick the main unit on the door, the magnet on the frame. They should sit within 1 cm of each other when the door is closed.
4
Build an automation
In eWeLink → Scene → "If DW2 opens after sunset, turn on hallway light". Or just enable push notifications for security alerts.

Is This Right for Me?

Connection: Wi-Fi 2.4 GHz (direct, no hub)
Power: 2× AAA batteries (included)
Battery life: 6–12 months typical use
Sound alert: No - phone notification only
Installation: Adhesive tape, no drilling
Magnet gap: Up to ~2 cm separation triggers "open"
App: eWeLink
History log: Every open/close with timestamp
Size: 7 cm long, 3.1 cm wide, 1.9 cm thick

Product Details

Sonoff Wi-Fi Door/Window Sensor (DW2)

A wireless sensor that detects when a door or window is opened or closed, and sends an instant notification to your phone. It connects directly to your Wi-Fi – no hub needed. Use it for security alerts, or pair it with other Sonoff devices to create automations.

Key Features:

  • Instant Alerts: Get a phone notification the moment a door or window is opened.
  • No Hub Needed: Connects directly to your home Wi-Fi via the eWeLink app.
  • History Log: See a record of every open/close event with timestamps.
  • Smart Automations: Trigger other devices when the door opens – e.g., turn on the hallway light.
  • Battery Powered: Uses 2 x AAA batteries – lasts for months. No wiring needed.
  • Easy Installation: Stick with adhesive tape – one piece on the door/window, one on the frame.

Pro Tip: Place one on your front door and set up an automation: when the door opens after sunset, the hallway light turns on automatically. When it closes, the light turns off after 2 minutes.

What You Get

Instant phone alert
Push notification the moment the door or window opens. Open from anywhere - work, abroad, the village.
No hub, no wiring
Connects directly to your Wi-Fi. Sticks on with adhesive tape - 2-minute install, no electrician.
Months of battery
Two AAA batteries last 6–12 months depending on how often the door opens. Battery-low warning in the app.
Auto-trigger smart lights
Pair with a Sonoff switch in eWeLink: hallway light turns on automatically when the front door opens after sunset.
Open/close history
Every event logged with a timestamp. Useful for tracking when family members come home, or when something opens unexpectedly.

A Closer Look

Discover Smartio's Sonoff Collection

Sonoff Door/Window Sensor | DW2

Sonoff Wi-Fi Door & Window Sensor (No Hub Needed) | DW2: Discover Smartio's Sonoff Collection

Sonoff DW2 Door Sensor

Remind you when door/window is opened or closed. Keep linkage with Sonoff smart products for your easier smart life.

Sonoff DW2 Door Sensor
Sonoff Wi-Fi Door & Window Sensor (No Hub Needed) | DW2, detail 3
Sonoff Wi-Fi Door & Window Sensor (No Hub Needed) | DW2, detail 4
Sonoff Wi-Fi Door & Window Sensor (No Hub Needed) | DW2, detail 5

Works With

Amazon Alexa (notifications)
Works
Google Assistant (notifications)
Works
Sonoff scenes via eWeLink
Works

Control with the eWeLink app

eWeLink app icon
eWeLink
Set up your Sonoff Wi-Fi Door & Window Sensor (No Hub Needed) | DW2 in minutes - voice control, scenes, automations, away mode.
App Store Google Play
View app

What's in the Box

1× Sonoff DW2 sensor (main + magnet)
2× AAA batteries
Adhesive tape

Delivery & Pickup

Standard Delivery
All Lebanon governorates, within 2–4 working days.
4 $ · Free over 50 $
Express Delivery
Faster shipping, available across all Lebanon. Your exact delivery date depends on your town - you will see it at checkout.
Check your town 6 $ flat
Pickup - Dekwaneh
Collect from the Wakilni warehouse in Dekwaneh. We send the exact address on WhatsApp when your order is ready. Weekdays 10am–5pm, Sat 10am–1pm.
3 $ · Free over 30 $

Warranty & Support

6-month Local Warranty
Covers defects in materials & workmanship. Handled here in Lebanon.
WhatsApp Support - Always On
Can't set it up? Message us. We reply within minutes, not days.
14-day Exchange - Unopened Items
The item must be unopened and in its original packaging. Exchange it for a product of equal or higher value - we do not give cash refunds. Opened items are covered by the warranty if there is a factory defect.
Free Setup Call
If you get stuck, we'll walk you through the setup on a free WhatsApp call.

Frequently Asked Questions

Does it detect motion too? ›
No - it only detects when the magnet separates from the main unit (door/window opening). For motion, get a separate motion sensor like the SNZB-03P.
Does it make a sound when triggered? ›
No built-in alarm. It sends a phone notification only. If you want an audible alert, pair it in eWeLink with a Sonoff plug + a small Wi-Fi siren or speaker.
Does it need a hub? ›
No - connects directly to your 2.4 GHz Wi-Fi via the eWeLink app. No bridge needed.
How long do the batteries last? ›
Typically 6–12 months. Depends on how often the door opens. The app shows battery level and warns you when low.
Will it work during EDL outages? ›
The sensor itself is battery-powered, so it keeps running. But to send a notification it needs your Wi-Fi - so if your router is down, the events queue up until the router is back.
Can I use it on a balcony door or aluminum frame? ›
Yes - works on glass, wood, aluminum, and steel. Just make sure the magnet and main unit are close enough (within ~2 cm when closed).
Can I order multiple at once? ›
Yes - order as many as you need. Each one pairs separately in eWeLink with its own name ("Front Door", "Kitchen Window", etc.).
Will this drain my Wi-Fi network with constant traffic? ›
No - it sleeps between events to save battery and bandwidth. Only sends data when the magnet separates or rejoins.

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